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ZN85-40.5 Type Vacuum Circuit Breaker

The ZN85-40.5 indoor high-voltage AC vacuum circuit breaker is designed for use in indoor handcart-type switchgear with a three-phase AC supply of 50 Hz and a rated voltage of 40.5 kV. It is intended for switching load currents, overload currents, and fault currents in industrial and mining enterprises, power plants, and substations, and is suitable for applications requiring frequent operation. The circuit breaker is designed, manufactured, and tested in accordance with GB/T 1984 and relevant standards.

Keywords: High- and low-voltage complete sets – packaged substations – ring main units

Category:

Circuit breaker

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Product Description

　　Product Definition

　　The ZN85-40.5 indoor high-voltage AC vacuum circuit breaker is designed for use in three-phase, 50 Hz, 40.5 kV indoor handcart-type switchgear, serving industrial and mining enterprises, power plants, and substations as a device for switching load currents, overload currents, and fault currents, and is also suitable for applications requiring frequent operations. The circuit breaker is designed, manufactured, and tested in accordance with GB/T 1984 and relevant standards.

　　Normal operating conditions

　　1. Ambient temperature shall not exceed +40°C or fall below -10°C (storage and transportation are permitted at -30°C).

　　2. Altitude shall not exceed 1,500 m.

　　3. Relative humidity: the daily average shall not exceed 95%, the monthly average shall not exceed 90%, and the daily average of saturated vapor pressure shall not exceed 2.2 × 10⁻³ MPa, with the monthly average not exceeding 1.8 × 10⁻³ MPa.

　　4. The seismic intensity shall not exceed 8 degrees.

　　5. Locations free from fire hazards, explosion risks, severe contamination, chemical corrosion, and violent vibrations.

　　Main Technical Parameters of the Product

Name Unit Data
Rated voltage kilovolt 40.5
1-minute power-frequency withstand voltage (RMS) kilovolt 95
Lightning Impulse Withstand Voltage (Peak) kilovolt 185
Rated frequency Hertz 50
Rated current A 1250/1600/2000/2500
Rated short-time withstand current kA 20/25/31.5
Rated Peak Withstand Current kA 50/63/80
Rated short-circuit duration s 4
Rated short-circuit breaking current kA 20/25/31.5
Rated short-circuit making current kA 50/63/80
Rated Operating Sequence   O-0.3s-CO-180s-CO
Breaking time millisecond <80
Rated short-circuit breaking current breaking operations next 20
Breaking current of a single capacitor bank A 630
Breaking current of back-to-back capacitor banks A 400
Rated operating voltage v AC/DC 110, 220
Mechanical life next 10000
设计原理 动态屈光+单点多焦
镜片材质 PC太空镜片
瞳距标尺 54mm-68mm
镜片屈光度 +2.00D~-5.00D
眼镜尺寸 160*13.3*7.3mm
眼镜重量 45g
镜盒重量 239g
镜盒电池规格 2600ma
眼镜电池规格 180ma
传动系统寿命 50万次